PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/25-14:57:50
G07     303.9          44.7               11.2 +/-    0.90      15.2 +/-    0.90  0.050 / 0.090
G08     132.7          38.5               14.7 +/-    1.19      22.0 +/-    1.19  0.050 / 0.110
G09     309.0          76.8               12.4 +/-    0.75      12.7 +/-    0.75  0.040 / 0.070
G16     41.8           24.6                9.4 +/-    1.63      18.5 +/-    1.63  0.050 / 0.080
G23     141.2          61.8               15.2 +/-    1.20      17.0 +/-    1.20  0.130 / 0.240
G27     82.0           37.1               10.6 +/-    0.51      16.1 +/-    0.51  0.090 / 0.210
G28     223.0          10.8               -2.2 +/-   21.85      -6.1 +/-   21.85  0.040 / 0.050
G30     284.3          21.1               10.9 +/-    1.83      23.4 +/-    1.83  0.030 / 0.050